archaean era

简明释义

太古代

英英释义

例句

1.Microbial life thrived in the oceans during the archaean era 太古代, contributing to the planet's early biosphere.

在太古代 archaean era期间，微生物生命在海洋中蓬勃发展，为地球的早期生物圈做出了贡献。

2.The atmosphere during the archaean era 太古代 was vastly different from what we experience today.

在太古代 archaean era期间，大气层与我们今天所经历的截然不同。

3.The formation of the Earth's crust began during the archaean era 太古代, which lasted from about 4.0 to 2.5 billion years ago.

地球地壳的形成始于太古代 archaean era，大约在40亿到25亿年前。

4.Life on Earth started to emerge in the archaean era 太古代, primarily in the form of simple prokaryotic organisms.

生命在地球上开始出现于太古代 archaean era，主要以简单的原核生物形式存在。

5.Geologists study rock formations from the archaean era 太古代 to understand the early conditions of our planet.

地质学家研究来自太古代 archaean era的岩石层，以了解我们星球早期的环境条件。

作文

The archaean era is a significant period in Earth's history, spanning from about 4.0 to 2.5 billion years ago. This era is characterized by the formation of the Earth’s first stable crust and the emergence of life. Understanding the archaean era is crucial for comprehending the evolution of our planet and the origins of life itself. During this time, the Earth was still a hostile environment, with high volcanic activity and a lack of free oxygen in the atmosphere. Despite these harsh conditions, the first simple life forms began to appear, primarily in the form of prokaryotic microorganisms such as bacteria and archaea.The geological features that emerged during the archaean era laid the groundwork for future developments in Earth's crust. The formation of continental landmasses began during this time, which would eventually lead to the more complex ecosystems we see today. The rocks formed during the archaean era are some of the oldest on Earth, providing invaluable insights into the planet's early conditions. These ancient rocks, often referred to as cratons, are found in regions known as shields, where they have been exposed by erosion.One of the most remarkable aspects of the archaean era is the evidence of early life. Fossils from this time are rare, but stromatolites—layered structures created by the activity of microbial mats—provide a glimpse into how life began to shape the planet. These structures are still formed today in some environments, indicating that the processes that started during the archaean era continue to this day.The atmosphere during the archaean era was vastly different from what we experience now. It was rich in methane, ammonia, and other gases, but lacked free oxygen. This anaerobic environment was conducive to the survival of the earliest life forms, which thrived in extreme conditions. As photosynthetic organisms began to evolve towards the end of the archaean era, they started to produce oxygen as a byproduct of photosynthesis. This gradual increase in atmospheric oxygen would pave the way for the evolution of more complex life forms in subsequent eras.In conclusion, the archaean era represents a critical chapter in the story of our planet. It marks the beginning of life and the formation of the Earth's first solid crust. By studying this era, scientists can gain insights into the conditions that led to the emergence of life and the geological processes that shaped the Earth. The discoveries made through the study of the archaean era not only enhance our understanding of the past but also inform our knowledge about the potential for life on other planets. As we continue to explore and research this ancient period, we uncover more about the origins of life and the fundamental processes that govern our planet's evolution.

太古代是地球历史上一个重要的时期，约从40亿年前到25亿年前。这个时代的特点是地球首个稳定地壳的形成和生命的出现。理解太古代对我们理解地球的演变及生命起源至关重要。在这一时期，地球仍然是一个恶劣的环境，火山活动频繁，且大气中缺乏自由氧气。尽管条件严酷，最早的简单生命形式开始出现，主要以原核微生物（如细菌和古菌）的形式存在。在太古代期间形成的地质特征为未来地壳的发展奠定了基础。大陆陆块的形成始于这一时期，最终导致我们今天所见的更复杂的生态系统。太古代期间形成的岩石是地球上最古老的岩石之一，为地球早期条件提供了宝贵的见解。这些古老的岩石，通常被称为克拉通，分布在称为地盾的地区，因侵蚀而暴露出来。太古代最显著的方面之一是早期生命的证据。这一时期的化石非常稀少，但由微生物层状结构形成的叠层石为我们提供了生命如何开始塑造地球的线索。这些结构今天在某些环境中仍然形成，表明在太古代期间开始的过程至今仍在继续。在太古代期间，大气与我们现在所经历的截然不同。它富含甲烷、氨和其他气体，但缺乏自由氧气。这种厌氧环境有利于最早生命形式的生存，它们在极端条件下茁壮成长。随着光合生物的逐渐演化，直到太古代末期，它们开始将氧气作为光合作用的副产品释放。大气中氧气的逐步增加为后续时代更复杂生命形式的演变铺平了道路。总之，太古代代表了我们星球故事中的关键篇章。它标志着生命的开始和地球第一固体地壳的形成。通过研究这一时期，科学家可以深入了解导致生命出现的条件以及塑造地球的地质过程。对太古代的研究不仅增强了我们对过去的理解，还丰富了我们对其他行星上生命潜力的知识。随着我们继续探索和研究这一古老时期，我们将揭示更多关于生命起源及支配我们星球演变的基本过程。